OFFSET
1,1
COMMENTS
For n>2, k=a(n)-n.
EXAMPLE
The partitions of a(4)=9 into k=9-4 parts are
5+1+1+1+1, 4+2+1+1+1, 3+3+1+1+1, 3+2+3+1+1, 2+2+2+2+1.
MATHEMATICA
f[n_, k_] := Length[IntegerPartitions[n, {k}]]
t[n_] := Table[f[n, k] - k, {k, 1, n}]
b[n_] := Position[t[n], 0]
c = Flatten[Table[Last[b[n]], {n, 1, 60}]]
x = Flatten[Position[c, 1]]
y = Complement[Range[Length[x]], x]
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Mar 05 2012
STATUS
approved